Waterless cooker



A1181 1929- E. P. M CLURE 1,724,101

WATERLESS COOKER Original Filed Jan. 28, 1925 REIT? I P I rm 1 Mun" if@Ti 5 l atcnted Aug. 13, lQZlB.

Elli/EEK P,

PRODUCTS MCCL'URlEi, UL "WESTERN SPRINGS, ISL-121N015 AfiESIG-NOR TOALUMINUM COMZXE'ANY, A UORPORAIION OF IZJLEZNOIS.

WA'IFRLESS COOKER.

original application filed. January 28,

The invention relates to cooking utensils known in the art as waterlesscookers.

in the use of cookers of this type heretofore used, the food to becooked is placed within the cooker and the top or cover is securely heldto the ves 'el, more or steam-tight, and a relatively small vent madethrough the cover from which vapor or steam coi'istantly escapes duringthe cooking; process, the interior of the vessel being at substantiallyatmospheric pressure or a very little above it.

iltpplicaut has found that for practical purposes, to retain all of thedesirable savor of the food being cooked, it is best to seal the vesselaga' 'ist a f av ounces internal pres sure above atuusphoric pressure,and for purposes of economy, to provide alarm nicaus operable when theinternal pressure exceeds that at which it is desirable to beinaiutaiiual so that the heat applied to the vest may be .roouccd untilthe alarm becomes less frequent or ceases altogether.

llhls :tpjl'lctttiiili is a division of my copending application SerialNo. 84;,27'l, filed do our 28, 1926.

the drawings: iligure l is a plan view of a cooker enihr'nlying thepresent invention.

i icure 2 is a side eleviuxionv thereof. ire 3 is an enlarg, dfragmentsry sec-- tion taken on line lll lll of Figure l.

l igr ure l is a transverse section taken on line lVlV of Figure 3.

llinure 5 is a modification of Figure 3.

Ill all of the views the same reference characters indicate sin'lilarparts.

Food is more nourishing and possesses a better flavor when cooked at auniformly low temperature.

The cooker body 1.0 is provided with side handles 11 and rests upon aseparable heat distributing base plate 12. The cover has a handle i l bywhich it may be lifted and it is yieldii'igly held in contact with theopen end of the vessel by spring clamps 15.

A small. casing 16 is attached to the under side of the cover 13 underan outwardly bulged part 17 which is shown in Fig. 8 to be a part of thecover. The iioor wall of the easing; 16 is perforated at 18 to provide avent in connection. with the perforation 19 when the weight 20 isremoved from its 1926, Serial No. 8 ,53'71.

normal position covering the port 18. The smallness of the hole or port18, with the weight of the disk 20 requires several ounces pressurewithin the cooker before the latter will be vented by very slightlylifting the disk 20, thus opening the ports 18 and ii). lVhen this isdone the vapor passing through these small openings around tire weighteddisk produces a sharp whistling: sound.

it is then the duty of the cook to carefully reduce the intensity of theflame to an extent that the pressure is very nearly but not quitesufiicient to raise the weighted valve 20. i

The weight is only very slightly raised in operation and it only whenthe pres sure holds it open continuouslv that the 'liltbi'illllg soundmade. In usel the weightshould be raised interniittently, in which eventthe velocity of the escaping vapor is not suilicient to blow the whistleand there is sujliicient moisture within the vessel. The device is acombined automatic relief valve and whistle.

i am aware that many changes may be made, and numerous details ofconstruction may be varies through a wide range without departing fromthe principles of this invention, and I therefore do not purposelimiting the patent granted hereon, otherwise than necessitated. by theprior art.

I claim as my invention:

1. A combined safety valve and whistle for a cooking utensil, inclnding;a casing having two separated walls, each having; a small ventperforation and a weighted disk in said casing overlying anotherperforation and normally closing it.

2. A combined safety valve and whistle for a cooking utensil, includinga casing having two separated walls, each wall. having a relativelysmall perforation, another wall having a perfm'ation and a weighted diskin said casing normally closing; the last mentioned perforation, said,first named perforations arranged to cause escaping vapor to produce awhistling sound when the lower perforation is uncovered.

3. A combined safety valve and. whistle fora cooking utensil, comprisinga closed :asingr having, three separated walls, each wall having aperforation, a disk noii'inally Ilivided and this application filedSeptember Serial No. 138,416.

closing the lower perforation and adapted to be lifted by pressure, saidcasing having its upper walls spaced away from one another, and saidupper Walls being perforated whereby to produce awhistling alarm soundwhen the disk is raised and all perforations are open.

4. A combined safety valve and whistle including a casing havingmeans atits upper portion to produce a whistling sound upon the passage of vaportherethrough and having a lower perforated wall, and a weighted disk insaid casing to normally overlie the perforation of said lower wall inordor to prevent the passage of vapors therethrough.

5. A combined safety valve and whistle including a casing having aseries of perforated walls and a weighted disk movable in the casing,the pm'forations of certain of said walls being arranged to producev awhistling sound upon the osrapo o'l': vapom, and a disk normallycovering the perforation of another wall to prevent surh escape ofvapors.

In testimony whereof I have hereunto subscribed my name.

ELMER P. MoCLURE.

